磁铁改变了甲基生物和减少硫酸盐的细菌之间的代谢相互作用
Ginevra Giangeri1, Panagiotis Tsapekos1, Maria Gaspari2
1Department of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
Environmental science & technology
|October 20, 2023
概括
添加磁石可以通过减少硫化和提高甲产量来增强生物气体生产. 这项研究揭示了复杂的微生物相互作用,显示磁铁通过支持合成合作伙伴关系,有利于无氧消化.
科学领域:
- 环境微生物学 环境微生物学
- 生物技术是生物技术.
- 生物地质化学生物地质化学
背景情况:
- 硫酸盐的存在抑制了无氧消化过程中的甲产量.
- 减少硫酸盐的细菌与甲氧化物竞争基质,产生硫化.
- 了解微生物相互作用是优化生物气生产的关键.
研究的目的:
- 在硫酸盐应激下,在生物气生产中的微生物相互作用.
- 评估电导材料,特别是磁铁,以恢复甲生产.
- 研究磁石对微生物群落和代谢途径的影响.
主要方法:
- 无氧消化实验,有或没有添加磁铁.
- 对生物气体成分 (甲含量) 和硫化含量的分析.
- 基因组为中心的元基因组学,以确定微生物群落和相互作用.
- 挥发性脂肪酸 (VFA) 消费分析.
主要成果:
- 添加磁石增加了甲含量,减少了硫化含量.
- 挥发性脂肪酸的消费,特别是丁酸盐,酸盐和酸盐的消费量有所增加.
- 微生物分析揭示了甲素和硫酸盐减少细菌之间的竞争和合作相互作用.
- 磁铁促进了 * Methanosarcina * 和其合成伙伴的生长,并支持涉及 * Ruminococcus * sp. 的基于 DIET 的相互作用. DTU98 和 柔性.
结论:
- 磁石有效地通过减轻硫化抑制来提高无氧消化性能.
- 添加磁石促进了合成微生物相互作用,包括直接跨物种电子转移 (DIET).
- 这项研究阐明了甲原体和硫酸盐降解细菌在对硫酸盐和磁铁的反应中复杂的,依赖于群体的相互作用.
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